1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3548fdb41412927267383aec4d404138e4558c8d7ba666b45500dc7ba21031. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7887c3d3-9dc8-438d-ae70-77868e16bbf0.json and https://artists.proofprofile.net/proofs/artist/7887c3d3-9dc8-438d-ae70-77868e16bbf0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1812fa5bd2b653c0c5154d77d6504ba1efbc358a1593bf7f53e49b857e2b4d7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011635594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3bb01c646bbf07f580e5039afe74a0b9b4114ce431746035b7cd7d778f7340. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011635580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441b17c56008f0ee81081d9a8da84d603a4d7b08a8c80be1e805bbd3094ebe8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011635581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a59fe58aebba038326e32558701b65eb5ee2926a3d5ae8bea6f7293ff531e2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011635588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2dea017547865a9c0c7275dc2c96332e06e6da1fc76ac24920be81efc952a1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011635589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302b9c9fd1e8a721d4de6c0942b9ed1a92f3a1b6248a6bde5b30d269bd5f9a96. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd391a1bfa6aa65d09385536ce994060200e2e1b22a396c87db1737ec7b3a69fd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48ceec5512fae4ec6613a87a43347e1cde0850b8aa7d74fb99eee2bbae80f1a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0156d0b0ab2372828ad446563448b1debfb6ae4d37ceeab037baa06b9ddf05f2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5af75602c67336b642f4de0cc07d05b1059e3fd4fa37eb4a7ce43ffbe04f3f3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c7f9a3ab462bd58436cfdc2c600f03060a1419cb74e8036266d2a180165a37. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642cbff466727fe051792aef58b7a165c23b17dff78f58a92f446aef7f2dd7eb. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:36:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bf21c829aa7e793d662d790d89451f12ed897d92da216cb344cca0283c4c0f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011692651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccb1c3530492fc049a09624b25263657f6a6cb9a0cdf73d0363d4ea26228ab7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF0215451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075a1573fcc208de24590087f9057749bd4c6925addda5ae953ada3c4d30cf1e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011765505.